Sponsored

Oil weight in warmer climates

Gman7176

New Member
Joined
Nov 29, 2025
Threads
0
Messages
3
Reaction score
5
Location
Texas
Vehicle(s)
2017 GT, 1996 GT
This is just my 2 cents as this oil argument can go on forever as every diver and vehicle has different purpose or style of driving.
my gen 2 coyotes have 5w-20w on the filler cap and it’s probably adequate for most climates in mild normal driving conditions. Ford previously recommended 5w-30w for track days with the gen 2, now I see that they recommend 5w-50w for track and or boosted engines.
my twin turbo cars run amsoil 15w-50w because I trust it and it’s hotttt! In Texas right now heat index was 122 yesterday. NA coyotes run motorcraft 5w-30w even if I’m abusing them.
Again just what works for me so far with multiple engines over 100k miles and no oil related failures.
If you want to dive into the deep end I recommend you check out the “oil geek” Lake Speed Jr. on his you tube channel to fully understand the science and engineering behind the oil.

And most of all remember that the 0w and 5w oils are in the engine to help out with the fuel economy for the CAFE testing.
I probably wouldn’t run a 20-50w unless I was racing the car full time on the track and had opened up the bearing clearances.

Lastly and my number one rule, make sure the oil is at operating temperature before hammering on the engine and watch the cylinder head temperatures when in traffic with the ac running.
 

tastetickles

Well-Known Member
Joined
Jan 21, 2026
Threads
2
Messages
75
Reaction score
42
Location
Borneo
Vehicle(s)
Focus RS, Jeep Gladiator, Mustang GT
Hell no I wouldn’t run 20w50 and I live in a tropical weather. I would however eventually move towards a API SQ oil 0w40. On track I would run 5w50 or 10w60.
 
OP
OP

BlackM

Member
Joined
Jul 22, 2026
Threads
1
Messages
7
Reaction score
8
Location
South Carolina
Vehicle(s)
2024 Dark Horse H850, 3-1978 Mustang King Cobras, 1978 Cobra, +3 more


Junkyard Dog

Well-Known Member
Joined
Jun 3, 2025
Threads
56
Messages
2,761
Reaction score
2,268
Location
Georgia
Vehicle(s)
2024 Dark Horse
Road racing and maybe a visit to the strip. Just for fun with DH if I would race seriously I would take my Formula race car to track.
I am curious to find out how or whether the Hennessy stays cool on the race track with 850 hp.
 
 








Top